What was the central technological focus of Stanley’s innovation?
Answer
Replacing the weakest link (the glass interior) with metal strength.
While vacuum insulation was known, Stanley’s specific genius lay in making the container robust by replacing the fragile glass interior with the strength of steel.

Related Questions
What practical problem did the creation of the Stanley vacuum bottle address?Who is credited as the inventor behind the durable, all-steel vacuum solution?In what approximate year did William Stanley Jr. conceive of the all-steel vacuum bottle?What key component did Stanley replace with steel in his revolutionary vacuum bottle design?Who were the earliest adopters of the Stanley unbreakable bottle?Why were traditional glass liners deemed insufficient for the original intended users?What historical year is prominently featured in the modern identity of the Stanley brand?How was the Stanley bottle initially positioned in relation to its function?What was the central technological focus of Stanley’s innovation?What was the goal that Stanley aimed to merge in his revolutionary product?